North Korea test-fired a submarine-based ballistic missile from the East Sea on Wednesday, said South Korea’s Joint Chiefs of Staff.
North Korea’s launch took place in the waters off Sinpo, South Hamgyong Province in the early morning.
This comes amid the annual joint military exercise between US and South Korea, which kicked off on Monday.
The annual drill includes 25,000 US troops, the bulk of which are already stationed in Korea, according to a statement by US Forces Korea.
North Korean has made threats of nuclear retaliation if the two-week drill “show the slightest sign of aggression,” a spokesman for North Korea’s military was quoted as saying by the country’s state media.